Ink cartridge



FIG. 1 is a perspective view of an ink catridge;

FIG. 2 is a right side view thereof; and,

FIG. 3 is an enlarged partial cross-sectional view thereof taken along the lines 3—3 of FIG. 2 and between the arrows A—A of FIG. 2.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an ink cartridge, as shown and described. 